JAMB - Chemistry (2000 - No. 44)
The chlorinated alkane often used industrially to remove grease is
tetrachloromethane
chloromethane
trichloromethane
dichlorometane
Paliwanag
Tetrachloromethane is an effective solvent within the chemical industry and is used to clean machinery and electrical equipment. It is however used to remove grease in the industries.